An aeroplane flies 200km with a uniform speed of 300 km/hr and them another 200km with a uniform speed of 240km/hr. Calculate the average speed of the aeroplane
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Answer:
268.4 km/h
Explanation:
Total distance travelled
➞ 200 + 200
➞ 400 km
Speed of first 200km (V1) = 300 km/h
Speed of second 200km (V2) = 240 km/h
➞ t1 = s1/v1
➞ t1 = 200/300
➞ t1 = 2/3
➞ t1 = 0.66s
➞ t2 = s2/v2
➞ t2 = 200/240
➞ t2 = 0.83s
➞ Vav = 200+200/0.66+0.83
➞ Vav = 400/1.49
➞ Vav = 268.4 km/h
Average velocity of aeroplane is 268.4 km/h
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